| Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186) |
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| 03/22/2000 | CN2370156Y Under well filter |
| 03/22/2000 | CN1247943A Oil pumping unit |
| 03/22/2000 | CN1247930A Multiple effluent method for producing petroleum from tar sand |
| 03/22/2000 | CN1247929A Design method process and equipment of mechanical oil production |
| 03/22/2000 | CN1247928A Fluid exploiting and conveying method and equipment utilizing gas |
| 03/22/2000 | CN1050651C Rod-free screw pump oil extraction equipment |
| 03/22/2000 | CA2248293A1 Reservoir fluids production apparatus and method |
| 03/21/2000 | US6039544 Oil lift system |
| 03/21/2000 | US6039121 Enhanced lift method and apparatus for the production of hydrocarbons |
| 03/21/2000 | US6039116 Oil and gas production with periodic gas injection |
| 03/21/2000 | US6039115 Safety coupling for rotary pump |
| 03/17/2000 | CA2294687A1 Triple action pumping system with plunger valves |
| 03/16/2000 | WO2000014381A1 Method adapted in order to prevent water from coning into an oil recovery well |
| 03/16/2000 | WO2000014380A1 Process for recovery of oil |
| 03/16/2000 | WO2000014379A1 Method for the in-situ extraction of gas from coal seams |
| 03/16/2000 | WO2000014378A1 Gas impulse device and method of use thereof |
| 03/15/2000 | CN2368976Y Energy saving hot fluid heating apparatus |
| 03/15/2000 | CN1247526A Method for recovering gas from hydrates |
| 03/15/2000 | CN1247270A Elongated logging and early trial production system for marine petroleum exploration |
| 03/15/2000 | CN1247269A Method and facilities for drilling well, logging and early trial production at same time |
| 03/15/2000 | CN1050406C Gas lift ball gas lift prodn. ball controlled and oil extracting method thereof |
| 03/15/2000 | CN1050405C Numerically controlled oil recovering appts. using residual well pressure |
| 03/14/2000 | US6036860 Method and apparatus for the separation of hazardous waste from groundwater |
| 03/14/2000 | US6036749 Variable ptich helices; operates on combined cetrifugal and gravitational forces; separation of gases in drilling fluids in petroleum wells |
| 03/14/2000 | US6035949 Methods for installing a well in a subterranean formation |
| 03/14/2000 | US6035934 Method and system for separating and injecting gas in a wellbore |
| 03/14/2000 | US6035933 Process for the thermo-hydraulic control of gas hydrates |
| 03/14/2000 | US6035880 Pressure activated switch valve |
| 03/14/2000 | US6035784 Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
| 03/09/2000 | WO2000012865A1 Controlling permeability of mineral bearing earth formations |
| 03/09/2000 | WO2000012858A2 Shaped-charge liner |
| 03/09/2000 | DE19840777A1 Cleaning contaminated ground comprises inserting a heating lance directly next to the vacuum level and bringing the ground air and ground to a higher temperature level by heat from the lance |
| 03/09/2000 | DE19839873A1 Arrangement for raising and lowering cleaning device in vertical, clad earth shaft, e.g. well shaft, has motor-driven winch above ground with pipe section on drum with central connector |
| 03/09/2000 | DE19839866A1 Verfahren zur in -Situ-Förderung von Gas aus Kohleflözen A method for in--Situ production of gas from coal seams |
| 03/08/2000 | EP0984134A2 Method and apparatus for down-hole oil/water separation during oilwell pumping operations |
| 03/08/2000 | CN2367764Y High-strength filtering tube |
| 03/08/2000 | CN2367763Y Oil-extraction device of flat-press by layer |
| 03/08/2000 | CN1246593A Method for reusing waste steam of steam-injected boiler |
| 03/08/2000 | CN1246578A Equipment for separating combustible gas from underground water |
| 03/08/2000 | CN1050174C Numerical control wind-power oil-pumping and water-injection combined equipment |
| 03/07/2000 | US6034037 Non-toxic inexpensive synthetic drilling fluid |
| 03/07/2000 | US6033567 Downhole fluid separation system incorporating a drive-through separator and method for separating wellbore fluids |
| 03/07/2000 | US6032743 Method and apparatus for reducing gas well production costs using improved downhole valves |
| 03/07/2000 | US6032739 Method of locating wellbore casing collars using dual-purpose magnet |
| 03/07/2000 | US6032737 Method and system for increasing oil production from an oil well producing a mixture of oil and gas |
| 03/07/2000 | US6032735 Gravel pack apparatus |
| 03/07/2000 | US6032734 Activating means for a down-hole tool |
| 03/02/2000 | WO2000011315A1 Two phase heat generation system and method |
| 03/02/2000 | WO2000011314A1 Method of injecting water and gas |
| 03/02/2000 | WO2000011313A1 System for the production of power/heat on an oil installation, and method and apparatus for the handling of hot exhaust gases from gas turbines |
| 03/02/2000 | WO2000011302A1 Device for drilling or draining holes in soil or rock |
| 03/01/2000 | EP0982470A2 Method for building a well |
| 03/01/2000 | EP0982469A2 Wellbore apparatus |
| 03/01/2000 | EP0981680A1 A connection device |
| 03/01/2000 | EP0981679A1 Process for stimulation of oil wells |
| 03/01/2000 | EP0616660B1 Method of propagating a hydraulic fracture using fluid loss control particulates |
| 03/01/2000 | CN2366554Y Wedge water distributing device |
| 03/01/2000 | CN2366553Y Stainless steel subsoil filtering screen for oil prodn. |
| 03/01/2000 | CN2366552Y Upside down placed type electric submersible screw pump oil prodn. installation |
| 03/01/2000 | CN2366551Y Bleed valve of downhole casing |
| 03/01/2000 | CN1245862A Hot air-steam mixed thickened oil inflow-out flow recovery method |
| 03/01/2000 | CN1049945C Construction method for big diam deep-well |
| 02/29/2000 | US6030928 Polymers useful in the recovery and processing of natural resources |
| 02/29/2000 | US6030048 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/29/2000 | US6029748 Method and apparatus for top to bottom expansion of tubulars |
| 02/29/2000 | US6029746 Self-excited jet stimulation tool for cleaning and stimulating wells |
| 02/29/2000 | US6029743 Compressor-assisted annular flow |
| 02/28/2000 | CA2281198A1 Pressure actuated safety switch for oil well perforating |
| 02/28/2000 | CA2246040A1 Lateral jet drilling system |
| 02/24/2000 | WO2000009851A2 Method for transportation of low molecular weight hydrocarbons |
| 02/23/2000 | EP0980463A1 Using equipment in a well system |
| 02/23/2000 | EP0980462A1 Expandable well screen |
| 02/23/2000 | EP0980442A1 In-situ chemical reactor for recovery of metals or purification of salts |
| 02/23/2000 | CN2365396Y Reusing perforator for oil and gas well |
| 02/23/2000 | CN2365395Y Combination pump seat broadening flow well |
| 02/23/2000 | CN1245243A Parameters design method for mechanically oil-producing technology with rod pump. |
| 02/23/2000 | CN1049719C Method for testing water-covering oil layer saturation degree by using normal boring sample-test reference |
| 02/22/2000 | US6027313 Gas assisted fluid delivery system |
| 02/22/2000 | US6026904 Method and apparatus for commingling and producing fluids from multiple production reservoirs |
| 02/22/2000 | US6026902 Method and apparatus for enhancing oil recovery |
| 02/22/2000 | US6026901 Method and system for separating and injecting gas in a wellbore |
| 02/22/2000 | US6026900 Multiple liner method for borehole access |
| 02/22/2000 | US6026898 Integral tubing head and rotator |
| 02/17/2000 | WO2000008302A1 Separator assembly |
| 02/17/2000 | WO2000008301A2 Connector for expandable well screen |
| 02/17/2000 | CA2339925A1 Separator assembly |
| 02/17/2000 | CA2280124A1 Composition and method for inhibiting corrosion in acidizing hydrocarbon-producing formations |
| 02/16/2000 | EP0979902A1 Well water collection chamber and sedimentation tank therefor |
| 02/16/2000 | EP0979345A2 Oil separation and pumping systems |
| 02/16/2000 | CN2364212Y Adjustable hydraulic water distribution fisher |
| 02/16/2000 | CN2364211Y Perforating gun for oil and gas well |
| 02/16/2000 | CN2364038Y Quartzite |
| 02/16/2000 | CN1244742A High electric resistance earthing system for oil welle lectric system |
| 02/16/2000 | CN1244633A Spiral tube system combined with submersible pump system |
| 02/16/2000 | CN1049369C Sand controller for crude oil well end |
| 02/15/2000 | USRE36566 Spoolable coiled tubing mandrel and gas lift valves |
| 02/15/2000 | US6024868 Air flow control circuit for sustaining vacuum conditions in a contaminant extraction well |
| 02/15/2000 | US6024866 Method of scavenging hydrogen sulfide from hydrocarbons |
| 02/15/2000 | US6024514 Tool, Tool system and method for coupling and installing subsea pipelines |
| 02/15/2000 | US6024171 Method for stimulating a wellbore penetrating a solid carbonaceous subterranean formation |